McqMate
Chapters
| 1. |
Velocity head is given by |
| A. | V/g |
| B. | V2/2g |
| C. | V3/2g |
| D. | V2/2g2 |
| Answer» B. V2/2g | |
| 2. |
Euler’s equation (in differential form) is written as: |
| A. | dp/ρ + v2.dv + g.dz = 0 |
| B. | dp/ρ + v.dv + g.dz = 0 |
| C. | dp/ρ + v.dv + g2.dz = 0 |
| D. | dp/ρ2 + v.dv + g.dz = 0 |
| Answer» B. dp/ρ + v.dv + g.dz = 0 | |
| 3. |
In which of the following measuring devices Bernoulli’s equation is used: |
| A. | Venturimeter |
| B. | Orificemeter |
| C. | Pitot tube |
| D. | All the above. |
| Answer» D. All the above. | |
| 4. |
The co-efficient of discharge of an orificemeter is ......that of a venturimeter. |
| A. | Equal to |
| B. | Much smaller than |
| C. | Much more than |
| D. | Any of these. |
| Answer» B. Much smaller than | |
| 5. |
The piezometric head is the summation of : |
| A. | Velocity head and pressure head |
| B. | Pressure head and elevation head |
| C. | Velocity head and elevation head |
| D. | None of the above. |
| Answer» B. Pressure head and elevation head | |
| 6. |
The total-energy-line in pipe flow is a graphical representation of the Bernoulli’s equation and represents the sum of velocity head, pressure head and the elevation head above: |
| A. | The top of the pipeline |
| B. | The arbitrary horizontal datum |
| C. | The centre line of pipe |
| D. | The bottom of the pipe. |
| Answer» B. The arbitrary horizontal datum | |
| 7. |
The total energy represented by the Bernoulli’s equation (p/ρg +V2/2g +z) has the units: |
| A. | Nm/s |
| B. | Ns/m |
| C. | Nm/m |
| D. | Nm/N. |
| Answer» D. Nm/N. | |
| 8. |
The Bernoulli’s equation written in the conventional form p/ρg + V2/2g + z = constant total energy per unit of certain quantity. Identify this quantity from the choices given below: |
| A. | Energy per unit mass |
| B. | Energy per unit weight |
| C. | Energy per unit volume |
| D. | Energy per unit specific weight. |
| Answer» B. Energy per unit weight | |
| 9. |
A venturimeter is used for measuring: |
| A. | Pressure |
| B. | Flow rate |
| C. | Total energy |
| D. | Piezometric head. |
| Answer» B. Flow rate | |
| 10. |
The co-efficient of discharge (Cd) of venturimeter lies within the limits: |
| A. | 0.95 to 0.99 |
| B. | 0.8 to 0.85 |
| C. | 0.7 to 0.8 |
| D. | 0.6 to 0.7 |
| Answer» A. 0.95 to 0.99 | |
| 11. |
A Pitot-tube is used for measuring: |
| A. | Velocity of flow |
| B. | Pressure of flow |
| C. | Flow rate |
| D. | Total energy. |
| Answer» A. Velocity of flow | |
| 12. |
When a Pitot-tube is put to use it must be ensured that its alignment is such that: |
| A. | The horizontal leg should be inclined at 45° in plan |
| B. | Its horizontal leg is at right angles to the flow direction |
| C. | Its opening faces upstream and the horizontal leg is perfectly aligned with the direction of flow |
| D. | None of the above. |
| Answer» C. Its opening faces upstream and the horizontal leg is perfectly aligned with the direction of flow | |
| 13. |
The hydraulic gradient-line indicates the variation of which of the following: |
| A. | Velocity head in flow direction |
| B. | Piezometric head in the direction of flow |
| C. | Total energy of flow in the direction of flow |
| D. | None of the above. |
| Answer» B. Piezometric head in the direction of flow | |
| 14. |
The momentum correction factor β is used to account for: |
| A. | Change in direction of flow |
| B. | Change in total energy |
| C. | Non-uniform distribution of velocities at inlet and outlet sections |
| D. | Change in mass rate of flow. |
| Answer» C. Non-uniform distribution of velocities at inlet and outlet sections | |
| 15. |
The change in moment of momentum of fluid due to flow along a curved path results in: |
| A. | A change in pressure |
| B. | Torque |
| C. | A change in the total energy |
| D. | None of the above. |
| Answer» B. Torque | |
| 16. |
Which of the following is an example of free vortex flow? |
| A. | A whirlpool in a river |
| B. | Flow of liquid through a hole provided at the bottom of a container |
| C. | Flow of liquid around a circular bend in a pipe. |
| D. | All of the above. |
| Answer» D. All of the above. | |
| 17. |
In case of forced vortex, the rise of liquid level at the ends is .... the fall of liquid level at the axis of rotation. |
| A. | Less than |
| B. | More than |
| C. | Equal to |
| D. | None of the above |
| Answer» C. Equal to | |
| 18. |
In case of a closed cylindrical vessel sealed at the top and the bottom the volume of air before rotation is ...... the volume of air after: |
| A. | More than |
| B. | Less than |
| C. | Equal to |
| D. | None of the above |
| Answer» C. Equal to | |
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